80821899235620 has 72 divisors (see below), whose sum is σ = 255818881071936. Its totient is φ = 20615440963392.

The previous prime is 80821899235559. The next prime is 80821899235633. The reversal of 80821899235620 is 2653299812808.

80821899235620 is a `hidden beast` number, since 8 + 0 + 82 + 189 + 9 + 2 + 356 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9761094802 + ... + 9761103081.

It is an arithmetic number, because the mean of its divisors is an integer number (3553040014888).

Almost surely, 2^{80821899235620} is an apocalyptic number.

It is an amenable number.

80821899235620 is an abundant number, since it is smaller than the sum of its proper divisors (174996981836316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80821899235620 is a wasteful number, since it uses less digits than its factorization.

80821899235620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19522197921 (or 19522197916 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 80821899235620 in words is "eighty trillion, eight hundred twenty-one billion, eight hundred ninety-nine million, two hundred thirty-five thousand, six hundred twenty".